Grinding-machine



(No Model.) 1 7 .4 Shets-Sheef 1} G. W. WATROUS. I 4 I GRINDING MACHINE. v No; 45a,297. Patented June 2, 1-891.

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NO. 453,297 r Patented June 2, 1891.

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- GRINDING MACHINE. No. 453.297.

Patented June 2, 1.891.

. To all whom it may concelrnh Be it known that I, GEORGE W. WATnoUs,

,NITED GEORGE w. wATnoUs, on NORWICH, (emanates GRlNDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 453,297, dated June 2, 1881.

Application filedFebruary 16, 1891. Serial No. $8 1,662. (Remodel;

a citizen of the United States, residing at Norwich,in the county of New London and State of Connecticut, have made certain new and useful Improvements in Grinding-lilachines,

which improvementsare fully set forth and described in the following specification, reference being had to the accompanying four sheets of drawings.

This inventionis in machines of the class used for grinding cutlery and the like articles, and has for its object the production of a serviceable machine in which a multiple of such articles may be quickly clamped, adjusted, and ground to shape and size, the movement of the grinding-wheel being controlled by hand or by automatic mechanism, as preferred.

To more readily explain my said invention, I have provided the annexed drawings, in which .Fignre 1 is a side elevation of a grindingmachine of my simplest construction, the advance or feed movement of the grinding-wheel being controlled by hand. Fig. 2 is a side elevation of a similar machine, having automatic devices for controlling said wheel. Fig. 3 is an elevation of the machine of Fig. 2, as viewed from the left-hand cnd,the vertical screws 43 being broken away above the ways 40 to expose certain parts located at the rear of said screws. Fig. 4 is a top or plan view of the ways on which the grinding-wheel travels and of the feed-screw by whieh'said wheel is controlled. Figs. 5 and 6 show, respectively, top and side views of a portion of the bed 22 with one of my improved adjustable knife-holders attached thereto. Fig.7 is an end view of one of said knife-holders considerably enlarged, and Fig.8 a side view of the holder'of Fig. 5 removed from bed 22.

Fig. 9 is a detached View of the clamp e employed to hold a knife during the operation of grinding, and Fig. 10 is a detached view of the binding-screw and nut used in connection with said clamp.

In the drawings, denotes the bed of my grinding-machine suitably supported on legs 21, and having fixed on its upper face a block 22, on which removable clamps or holders are provided to support the knives or other work to be ground. In Figs.1,2,and;3 tl1ese;holders are shown as simplerectangularblocks.

Secured to bed 20 at its; four cornersare posts 23, that support at their upper-ends frame 24, which provides bearings fora shaft 25,that constitutes the main or driving shai of the machine. This shaft maybe driven from a counter-shaft, to whicir t'he inst-andloose pulleys 2G and 27-may be-connected by abelt 28.

Hung loosely onshaft 25 .is' a frame 2h, whose lower ends are boredto providejourn bearings for a shaft 30, on whichis loosely hung a second frame 31, having journaled'in its free end a shaft 32,0n which the grinding wheel 33 is secured. On the last-named shaft 32 is a small pulley 34, which is connected by a belt 35 with a larger pulley 36, secured on'shaft 30, which shaft bears a second pulley 37, connected by belt 38 with a large pulley 3.), fixed on the driving-shaft 25. When the said driving-shaftris started, motion is communicated to shaft 30 and thence to shaft 32 and to the grinding-wheel p f Extending-along each side of the machine are bars 40 on which the free-ends of frame 31 rest in my simplest form of machines, as shown in Fig. 1, the ends of said bars being supported between nuts *1 and 4:2 on vertically-threadedrods 43. The arrangement of frames 29 and 231 permits the free end of the last-named frame and the grinding-wheel to be drawn along bars l0 over the work to be ground without interfering with the driving mechanism of said grinding-wheel. The vertical screw-rods 4S and nuts 41 and 42, which, as 1 have abo'vc stated, support the bars 40, are provided to permit said bars to be adjusted vertically to compensate for the wearing away of the grinding-wheel. As said wheel is reduced in diameter-bars i0 may be correspondingly lowered by lowering nuts 41 on the screw-rods. Nuts *2 are then screwed firmly down upon the ends of bars 40, and serve as cheek-nuts to prevent the accidental displacement of said bars. In a machine of the construction shownLin Fig. 1 frame 31 must be drawn along-bars; 40 by hand when'it isdesired to pass the grinding-wheel over the series of work-holderson block 22; .but in the machine shown in Figs. 2 and 3 l have provided an automatic feed a pulley 55, belted to a small pulley 56 on the tion over the work-holders, said teeth drop- .a seat for the handle and blade of a knife,

-the knife thereon may be raised or lowered mechanism by means of which the grindingwheel may be positively and steadily moved over said work-holders; In this last-named machine one end of shaft 32 bears awheel or roller 44, which rests and travels directly on bar 40. At the opposite end of shaft 32 the frame 31 is formed with teeth 45, cut on the perimeter of thejournal-bearing of said shaft, which teeth mesh with a worm or screw-shaft 46, supported in bearings -17 on bar 40. This screw-shaft bears at one end a miter-gear 48, that meshes with a corresponding gear 49 'on a shaft 50, journaled in stands 51 on rods 40, as most clearly shown in Fig, 3. Shaft also bears a cone-pulley 52, that may be connected by belt with a corresponding pulley 53 on a shaft 54, journaled in posts 23,above the shaft 50. This upper shaft 54 has on one end driving-shaft 25, and it will now be understood that when said driving-shaft is set in revolution and the grinding-wheel 33 caused to rotate motion will also be imparted to shafts 54 and 50 and to the screw-shaft 46, As the latter revolves, the tc eth 15 of frame 31 are caused to slowly travel along said screw, thus feeding the grinding-wheel along over the work-holders with a positive and steady movement. The arrangement of the feed screw and teeth 45 is such that the free'end of frame 31 may be readily raised and the grinding-wheel moved to any desired-posiping into mesh with the screw-threads when the frame 31 is lowered.

Having described my grinding machine proper, I will proceed to explain a novel form of work-holders especially designed for sup porting knives during the operation of grinding. The bed 22 is bored transversely, asat 57, Fig. 6, and the upper wall of said bedplaned away, as at 58, thus leaving an opening equal to perhaps onethird of the circumference of hole 57. \Vithin the circular seat thus provided I place a knife-holder, whose main or body portion 59 is circular in crossseclion and which fits said seat snugly, yet may be rocked to vary the inclination of its upper face. One end of the circular block 59' has a projecting plate 60, with an areshaped slot 61, through which a thumb-screw GIp'asses, said screwbeing tapped into bed 22, and serving to clamp" the circular block 59 firmly in place after the desired adjustment has been made. Hinged to the top-side of block 59 at. one end is a plate 63, whoseupper face is preferably recessed to provide the. free end of said .plate being drilled and tapped to receive a thumb-screw 611, whose end abuts the upper face of block 59. By adjusting this thumb-screw 64 plate 6-3 and at will. To clamp the knife securely in place 1 have provided 'a bar 65, hinged to one side of plate 63 and cut away, as at 66, to fit the knife-handle. The free end of bar 65 is slotted, as at 67, Fig. 9, to receive a screw 68, whose lower end is pivoted in plate 63 and whose free threaded end bears a nut 69. When it is desired to raise bar 65 to release the knife, nut 69 is unscrewed and screw 68 is swung outward, as in dotted. lines, Fig. 7, when said bar may be raised, as also indicated by dotted lines in the same figure. Provision is thus made for rocking the knife to vary the bevel of the finished blade, also for raising or lowering the end of said blade to grind it thin or thick, as desired.

My grinding-machine as a whole is of sim' ple construction, is strong and durable in its parts, and may be operated by a single attendant.

Having described my invention, I claim- 1. In combination with a bed bearing a multiple of work-holders, ways parallel with saidbed supported at each end by nuts on vertical screws, as set forth, a feed-screw shaft journaled on and parallel with one of said ways, mechanism, as described, for rotating said feed-screw shaft, and a grinding-wheel whose supporting-frame is formed with teeth that may engage the said feed-screw shaft, all being substantially as and for the object specified.

2. In combination with the main bed 22 of a grinding-machine and a bed fixed thereon bearing a multiple of workholders, as set forth, ways parallel with said bed, as set forth, corner-posts secured to bed-22, supporting a frame 24, a driving-shaft 25, journaled in said frame, and a grinding-wheel-supporting frame hung on said driving-shaft, said supportingfraine being composed of two joined sections 29 and 31, the free end of section 31 being supported by the described ways, all being substantially as and for the purpose specified. 3. Ina grinding-machine, in combination with a bed 22,bored and slotted transversely, as set forth, a'work-holder fitted to rock in said bed, having at one end a lateral projection 60, with arc-shaped slot, and a bindingscrew (in said slot) tapped into the bed 22, as and for the purpose specified.

4. In combination with bed 22, bored and slotted, as set forth, a work-holder fitted to rock in" said bed, means, as set forth, for clamping said work-holder to bed 22, a plate 63, hinged at one end to said work-holder, provided with an adjusting-screw 64 at the opposite end, and a lever, substantially as described, for clamping the work in position on said plate.

GEORGE 1V. WATROUS.

ICC 

